102189643 has 4 divisors (see below), whose sum is σ = 102482800. Its totient is φ = 101896488.

The previous prime is 102189611. The next prime is 102189653. The reversal of 102189643 is 346981201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102189643 - 2⁵ = 102189611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102189599 and 102189608.

It is not an unprimeable number, because it can be changed into a prime (102189653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146055 + ... + 146752.

It is an arithmetic number, because the mean of its divisors is an integer number (25620700).

Almost surely, 2^102189643 is an apocalyptic number.

102189643 is a deficient number, since it is larger than the sum of its proper divisors (293157).

102189643 is an equidigital number, since it uses as much as digits as its factorization.

102189643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293156.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 102189643 is about 10108.8893059525. The cubic root of 102189643 is about 467.5222603716.

The spelling of 102189643 in words is "one hundred two million, one hundred eighty-nine thousand, six hundred forty-three".